+(defun spinner-make-progress-bar (width &optional char)
+ "Return a vector of strings of the given WIDTH.
+The vector is a valid spinner type and is similar to the
+`progress-bar' spinner, except without the sorrounding brackets.
+CHAR is the character to use for the moving bar (defaults to =)."
+ (let ((whole-string (concat (make-string (1- width) ?\s)
+ (make-string 4 (or char ?=))
+ (make-string width ?\s))))
+ (apply #'vector (mapcar (lambda (n) (substring whole-string n (+ n width)))
+ (number-sequence (+ width 3) 0 -1)))))
+